Zylexis by Pfizer
How to keep a stressed horse from becoming a sick horse.

ZYLEXIS by Pfizer is an inactivated (killed) Parapox Ovis Virus Immunomodulator that has demonstrated efficacy and safety in stimulating the horse’s immune response to aid in the reduction of equine upper respiratory disease associated with EHV-1 and/or EHV-4 infections.
Zylexis 2ml bottle
Price: $43.50